# 函数作为返回值
def calc_sum(*args):
    ax = 0
    for n in args:
        ax = ax + n
    return ax


def lazy_sum(*args):
    def sum():
        ax = 0
        for n in args:
            ax = ax + n
        return ax

    return sum()


f = lazy_sum(1, 3, 5, 7, 9)
print(f)


# 闭包
def count(*args):
    fs = []
    for i in range(1, 4):
        def f():
            return i * i

        fs.append(f)
    return fs


print(count(1))

f1, f2, f3 = count()
print(f3())
print(f1())
print(f2())


def count():
    def f(j):
        def g():
            return j * j

        return g

    fs = []
    for i in range(1, 4):
        fs.append(f(i))
    return fs


f1, f2, f3 = count()
print(f3())
print(f1())
print(f2())
